Air purifier



FIG. 1 is a front-right perspective view of an air purifier showing my new design illustrating the rear tray in a lowered configuration;

FIG. 2 is a left side view thereof illustrating the rear tray in a raised configuration;

FIG. 3 is a front-left perspective view thereof illustrating the rear tray in a raised configuration;

FIG. 4 is a rear-left perspective view thereof illustrating the rear tray in a raised configuration;

FIG. 5 is a front view thereof;

FIG. 6 is a left side view thereof illustrating the rear tray in a lowered configuration; and,

FIG. 7 is a rear-left perspective view thereof illustrating the rear tray in a lowered configuration.

The surface ornamentation, which are the portions as shown in broken line, are shown for the purpose of illustrating environmental structure, and forms no part of the claimed design. 

CLAIM The ornamental design for air purifier, as shown and described. 